Use a workaround class To replace AsyncLocal

Author: maxisoft

ASFFreeGames/ASFFreeGamesPlugin.cs

@@ -40,7 +40,7 @@ internal static PluginContext Context {
 	}
 
 	// ReSharper disable once InconsistentNaming
-	private static readonly ThreadLocal<PluginContext> _context = new();
+	private static readonly Utils.Workarounds.AsyncLocal<PluginContext> _context = new();
 	private static CancellationToken CancellationToken => Context.CancellationToken;
 
 	public string Name => StaticName;

ASFFreeGames/Utils/Workarounds/AsyncLocal.cs

@@ -0,0 +1,75 @@
+using System;
+
+namespace Maxisoft.ASF.Utils.Workarounds;
+
+public sealed class AsyncLocal<T> {
+	// ReSharper disable once StaticMemberInGenericType
+	private static readonly Type? AsyncLocalType;
+
+#pragma warning disable CA1810
+	static AsyncLocal() {
+#pragma warning restore CA1810
+		try {
+			AsyncLocalType = Type.GetType("System.Threading.AsyncLocal`1")
+				?.MakeGenericType(typeof(T));
+		}
+		catch (InvalidOperationException) {
+			// ignore
+		}
+
+		try {
+			AsyncLocalType ??= Type.GetType("System.Threading.AsyncLocal")
+				?.MakeGenericType(typeof(T));
+		}
+
+		catch (InvalidOperationException) {
+			// ignore
+		}
+	}
+
+	private readonly dynamic? Delegate;
+	private T? NonSafeValue;
+
+	/// <summary>Instantiates an <see cref="AsyncLocal{T}"/> instance that does not receive change notifications.</summary>
+	public AsyncLocal() {
+		if (AsyncLocalType is not null) {
+			try {
+				Delegate = Activator.CreateInstance(AsyncLocalType)!;
+			}
+			catch (Exception) {
+				// ignored
+			}
+		}
+	}
+
+	/// <summary>Gets or sets the value of the ambient data.</summary>
+	/// <value>The value of the ambient data. If no value has been set, the returned value is default(T).</value>
+	public T? Value {
+		get {
+			if (Delegate is not null) {
+				try {
+					return Delegate.Value;
+				}
+				catch (Exception) {
+					// ignored
+				}
+			}
+
+			return (T) NonSafeValue!;
+		}
+		set {
+			if (Delegate is not null) {
+				try {
+					Delegate.Value = value!;
+
+					return;
+				}
+				catch (Exception) {
+					// ignored
+				}
+			}
+
+			NonSafeValue = value;
+		}
+	}
+}